Check valve



June 15, 1937. K, K; E 2,084,294

CHECK VALVE Filed Nov. 15, 1954 I nvehtor- Kehheth K; C cope-r,

Hi5 ttor-hel the check valve II), the cap Patented June 15, 1937 PA-r 1' OFFICE CHECK VALVE Kenneth K. Cooper, Fort Wayne, End, assignmto General Electric Company, a corporation of New York Application November- 15, 1934, Serial No. 753,094

5Claims.

t My invention relates to valves of a the cartridge In apparatus of various kinds', particularly refrigerating apparatus, it is desirable to provide a 5 small valve, such as a check valve for example,

which can be separately assembled and placed in valve with a minimum number of parts so as to simplify its manufacture and provide a packing or gasket as'a part of the cartridge valve structure. I accomplish this by employing a soft metal member that serves the dual purpose of forming a gasket and of holding the parts of the-valve together as a unitary structure.

Further objects and advantages of my invention will become apparent as the following descrlption proceeds, and the features of novelty which characterize my invention will be pointed out with particularity in the claims annexed to and forming a part of this specification.

For a better understanding of my invention,

reference may be had to the accompanying draw.-

ing in which Fig. 1 is a sectional view of a portion of a compressor casing containing a check valve embodying my invention, and Fig. 2 is a side elevation in' section of a modified form of check valve embodying my'invention.

Referring to the drawing, in Fig. 1, I have shown a check valve t0 embodying y invention,

which is mounted in a. recess liormed in the wall I2 of a casing, such as the end cap of a compressor casing. A compressor suction pipe l3 within the compressor casing communicates with the recess The check valve I0 is held in place by a; cap ll having a. passage l5 communicating with M being secured in place by bolts'lG and I1. j

The check valve I0 is made in two parts, one

part being a cylindrical valve seat plug l8, which has an annular peripheral flange l9 and a cylin-v drical central opening 20. The second part is a. cylindrical, cup-shaped valve retaining case 2|, its sides being closely fitted about the body of the seat plug l8. The valveiretaining case 2| is provided with an annular flange 22 extending about the open end thereof and closely fitting the flange IS on the seat plug l8. Passages 23 and an inwardly projecting stop' 24 are provided on the base of the valve retaining case 2 I. The inwardly projecting stop 24 serves to retain a valve disk or element 25 in position and to limit its opening "movement. The valve disk 25 is imperforate and cooperates with an annular seat 26 formed on the seat plug Hi to close the opening20 in the latter. A soft metal gasket portion or ring 21, which may be made of aluminum or the like, is fitted tightly about the peripheral edges of th'e'flanges l9 and 22 on the seat plug 8 and valve retaining case 2|, respectively. The edges of the ring 21 are bent around the flanges l9 and 22 thus holding the cup-shaped valve retaining case 2| and the v seat plug l 8 tightly together to form a unitary structure, the case 2| extending-from the gasket portion 21.

reticulated screen or strainer 28, which serves to prevent dirt or other foreign matter from entering the check valve. The screen 28 is provided with a peripheral flange 28a of the same diameter Y as that ofthefiange l8 and is also held in place by the soft metal ring 21. The screen28 may be spaced from the seat plugl8 by a washer 29. The soft metal ring 21 not only serves to hold the parts oi the check valve I ll together as a unitary structure in the manner-described'above, but it also serves as a gasket for the check valve l0 seating in the counterbore In formed in the wall The check valve l0 is also provided with a l2 of the casing and on the cap l4, when the check valve is clamped in the recess I inthe wall l2 'of the casing by the cap H. A gas-tight connection between the check valve I ll, wall |2 of the casing and the cap I4, is thus provided. I Duringthe operation of the check valve described, if the gas pressure inthe suction line I3 is reduced the gas in the opening moves the valve disk 25 to the left until it strikes the stop 24 on the valve retaining case 2|. 'Ihegas is then free to pass from the opening 2l l, around the edge of the valve disk25, and intothe suc tion' line l3 through the holes 23 formed inthe base of the valve retaining case-2|. When the gas pressure in the suction line l3 again 'exceeds the gas pressure in the opening 20,' the. pressure of the gas on the left side of the .valve disk 25 will force the latter to the right until it strikes the seat 26 formed on the seat plug It, the valve disk 25 being firmly seated thereon in the position shown in the drawing; -The opening 20 is thus closed and the passage of gas therethrough prevented. Y a A modified form of check valve embodying my tral opening. 32. The second part is a cylindrical cup-shaped valve retaining case 33, made 01 some soft metal such as aluminum. The sides of the valve retaining-case 33 are closely fitted about the 'body of the seat plug 30. The valve retaining case 33 is provided with an outwardly extending annular portion 34 which is fitted tightly about the peripheral edges of the flange 3! on the plug-seat 33. A stop 35 is provided in opening 32 in the seat plug The cup-shaped.

45' to cover all modifications within the spirit and.

' opening and having a flange adjacent said first the base of the retaining case 33 by a centrally located cylindrical depression formed therein and holes for-the passage of fluid are provided o'n each side of the stop in the base of the cupretaining case 33. The inwardly projecting stop 35 serves to retain an imperforate valve disk, 31

in position and to limit its opening movement. The valve disk or element 31 cooperates with an annular valve seat 33 formed on the seat plus 30 to close the opening 32 in the latter. The edge of the valve retaining case 33, which is bent ing-a valve seat plug having an opening therein around the flange 3 I, constitutes a gasket portion and also serves to hold in place a reticulated screen or strainer 39 which extends across the case 33 extends from the gasket portion and is integral therewith. The screen 39 is providedwith an annular flange 40 having the same ex ternal diameter as the flange 3|. This modified form of cartridge valve may be mounted in a recess, in the samemanner as the first modifijoint. between the valve and its supporting structure.

While I have shown a particular embodiment of my invention, I do not desire my invention to be limited to the particular construction shown. and described, and I intend in the appended claims scope of my invention. Y I

- Wfiat I claim as new and desire to secure by Letters Patent of the United States is:

1. A valve of the cartridge type comprising a 'said plug and said case together asa unitary structure, a portion of said casebeing positioned to form a gasket, and a valve element within" said case and cooperating with said seat to closesaid 'opening.

2. A check valve of the cartridge type comprising a valve seat plug having an opening therein and a valve seat adjacent thereto, an annular flange on said valve seat plug, a cup-shaped case made of soft metal and-having. a portion thereof bent over said flange to hold said plug and said case together as a unitary structure, the edge of said case being positioned toflorm a gasket, and a valve element retained in said case and 000perating with said seat to close said opening.

. 3.A check valve of the cartridge type comprising a valve seat plug having an'opening therein and a valve seat adjacent thereto, an annular flange on .said valve seat plug, a reticulated strainer extending across said opening and having a flange adjacent said first mentioned flange,

a cup-shaped case made of soft metal and having a portion thereof bent over-said flanges to hold 7 and a valve seat adjacent thereto, an. annular flange on said valve seat plug, a cup-shaped case having an inwardly projecting portion in the base thereof, the sides of said case'extending about said valve seat plug and providing a flange adjacent said first mentioned flange, a. valve element retained in position by the inwardly projecting portion of the case and cooperating with said 4 seat to close said opening, a reticulated strainer extending across said opening and having a flange adjacent 'said two previously mentioned flanges,-

and a gasket of soit metal, the edge of said gas-,

ketbeing bent over said flanges and cooperating therewith to hold said plug, said case and said strainer together as a unitary'structure.

5. A combined valve and strainer of the car-.

tridge' type comprising a valve seat plug having an opening therein and a valve seat adjacent thereto; an annular-flange on said valve seat plug, a reticulated strainer extending across said mentioned flange, a gasket portion made of soft metal bent over said flanges and cooperatin therewith to hold said valve seat plug and said strainer together as a unitary structure, said soft metal gasket portion also being positioned to form'a gasket, a valveelement cooperating-with said-seat to close said opening, and means in-' cluding'a cup-shaped case extending from said soft metal gasket portion and having an inward projection for retaining said valve element in position adjacent said valve seat.

KENNETH x COOPER. 

